Effects of Straw Returning on Soil Nutrients and Tobacco Growth
[Objective]To study the effects of returning barley and corn straw to tobacco planting soil,the prevalence of common diseases,the agronomic traits of tobacco,and the economic and chemical properties of tobacco.[Method]Field randomized block experiment was adopted,setting no field return+conventional application of tobacco compound fertilizer(CK),conventional tobacco compound fertilizer+ 6 000 kg/hm2 barley straw return to field(T1),conventional application of tobacco compound fertilizer+6 000 kg/hm2 corn straw return to the field(T2),the soil chemical properties,agronomic properties,tobacco leaf yield and chemical properties after transplanting the tobacco plants were meas-ured,and the occurrence of diseases were investigated.[Result]After T2 treatment,the soil pH,organic matter,alkaline nitrogen and availa-ble potassium content increased by 10.31%,44.19%,26.09% and 130.35% respectively compared with CK.T1 and T2 treatments promoted the agronomic traits of tobacco.The incidence and disease index of common mosaic disease and common mosaic disease were CK>T1>T2,and the incidence and disease index of black shank disease were CK>T2>T1;T1 and T2 treatments increased tobacco yield,output value and the proportion of top-quality tobacco;the coordination of chemical components in C3F tobacco leaves was T2>T1>CK.[Conclusion]Returning bar-ley and corn stalks to the field can improve soil fertility,improve the agronomic and chemical properties of tobacco leaves,reduce the preva-lence of diseases,and is conducive to the formation of high-quality,light-flavor flue-cured tobacco.
万方数据
维普
